Switch-controlled electrical connecter plug



March 26, 1929. L. PROPP 1,706,900

SWITCH CONTROLLED ELECTRICAL CONNECTER PLUG Filed June 192' 6 Fig.9

I294 Fi .5 H96 20 n Z0 Z 19 19 r r 1 18 i 6w; rfip i f6 i x f I INVENTOR ATTORNEY Patented Mar. 26, 1929.

UNlTED STATES LOUIS PEOPLE, 035 NEW YORK, N. Y.

SWITCH-CONTROLLED ELECTRICAL CONNEOIER PLUG.

Application filed June a, 1927. Serial No. 196,235.

This invention relates to switch-controlled electrical connecter plugs;

An object of the invention is to provide a unit cheaply manufactured and easily assembled accomplished by the simplification of the constituent parts and the reduction of the number of these parts.

A further object of the invention is to providea simple electric switch within the ordinary plug connector as now generally in use for completing the necessary electric circuits in operating electric irons, percolators, etc.

A further object is the introduction of a novel switch into apparatus of this type to eliminate the necessarily intricate parts of the ordinary snap action switch, provision being madefor actuating such a switch into either on or off position by the same linger.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplified in the construction hereinafter described, andof which the scope of application will be indicated in the following claims.

In the accoi'npanying drawing, inwhich is shown one of the various possible illustrative. embodiments of this invention,

Fig. 1 is an elevation of a connecter plug en'ibodyi ng the invention, a portion of the side wall. being broken away to disclose the switch, its actuating means and the connections there-- c Fig. 2 is an elevational view of the inner face of one of the plates eom irising the plug. all the metal parts being removed;

Fig. 3 is a like elevational view of the inner face of the associated plate;

Figs. 4, 5 and 6 are front, side and rear elevational views, respectively, of one of the switch elements;

Fig. 7 is a isometric view actuated lever for the switch;

Figs. 8, 9 and 10 are rear, side and front views, respectively, of another single element of the switch; and

Fig. 1.1 is a sectional View on line 1l-11 of Fig. l of the casing member alone.

of the linger- Referring in detail to the drawing, 2 denotes the casing of a connecter plug of the usual two-part construction comprising two complementary members 2" ordinarily made from phenol condensation products or other non-conducting material, easily worked in a mold. The usual enlargements 2 are pro vided for gripping the casing in making and breaking a connection. The members 2 are formed with grooves 3,41, 5 and G which, when the members are placed with their inner faces in Juntaposition, form passages 52 into which the terminal prongs ordinarily provided upon the electrical appliances (not shown), may be inserted to make contact with the current carrying parts within said passages 2 hereinafter described.

Extending through the members 2 are openings 7, 8, 9 and 10 for the reception of the cinitoi'nary retaining means such as the screws and nuts 11 for securing the members in face to face contact, see Fig. 1.

i The current carrying parts above referred to include a spring member l-il receiving and retaining its assoc1atcd spring member 15 in such manner as to make a positive metal contact with a terminal prong inserted between them.

Located within one of the enlargements 2 is resilient blade 16, one of the elements of the switch p ro'vided for controlling the operation of the appliance to which the plug attached. This blade, the construction of which. is clearly shown by Figs. 4 to G, is made of spring; metal. preferably stamped to provide an car 17 having an opening 18. This car together with extensions provided upon the sprin members it and 15 are clan'iped together by a screw 18 threaded into the member li r there by making the necessary metallic contact between thcse parts. Bent at right angles to and extemling outwardly from car 17 and upwardly therefrom is an arm 19 which is then turned backward upon itself to provide a portion 20 which, as shown in Fig 6, is pref-. erably made broad and fiat for purposes hereinafter appea ring.

Located in proximity to this downturned portion 20 is the contact lug}; 21 of. the switch element 29.. This element preferably made of a metal stamp having a bearing por- 7 of raised surfaces 2 retains the element 22 and prevents any movement thereof. Portion '23 is provided with o'peningsat 25 and 26. Opening 25 is threaded for the reception of screw'29 to attach one of the electrical conductors (not'shown) to element 22. The other opening 26 provides a journal for the reception of one pivotal end 27 of shaft 27 which extends through the finger actuated lever 28. This lever may be made of the same material as the casing 2 or of other insulating material so as to be non-conducting at the point of operation by the users finger. The other pivotal end 27 of said shaft is received in opening 30 provided in the other member '2". Said lever has an arm 31 extending without the plugth'roug'l'i an opening formed by thefa'ssoc'iation of recesses 32 and 33 in members 2 The end of the handle opposite arm 31 is formed with a prcsser end 34 which upon actuation of the lever 28 maybe made to press the downturncd spring port-ion 20 so as tobi'in'g'- t'l1eblade 16 into ongagement with the lug 21 to complete the electricalconnection; l -he spring portion 20 is so formed as to forcethe 'pi'esser end 34 in an upward direction and so retain it in actuated posit-ion.

' By moving the lever to the position-shown in dotted lines in Fig. 1, the portion 20 is allowed to move away from lug 21 to break the circuit. Efi'ect-ivequ'ick make and break is obtained by rounding off the faresser {end 34 in the manner shown at surface 87. Before the resilient blade 16 will have released from contact with lug 21, the rounded surface 37 w 'il'hbe Contact with the downturned portion 20,.an'd the force exerted by blade16wil'l be far enough beyond the effective center of 'thefle'ver 28 to allow the blade '16 to snap quickly away from the lug 21,

carrying the lever 28 with it.

In the passage formed by grooves 3 and 5' are placed current carrying parts 35 similar to members 14: and In the end of the plug opposite 'to said passage another passage '36 is provided through which the on ds of'a flexible cable is inserted, one, wire of which is connected to screw 29 inthe manner previously described while the other wire is directlyfconnected to the current carrying parts35 in the well understood manner. An

annular groove 36 may be provided communicating with the passage 36 for anchoring a coiled strain relief member (not shown).

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and. which is well adapted to meet the conditions of practical use.

As various possible en'ibodiments might be made of the above invention, and as various changes might be made in the cnibmlinient above set forth, it is to be understood that all matter herein set forth or shown in the avcompanying drawing isto be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. An electrical connector plug having switch means therein, said plug having an opening in one corner tl'icreoi, an actuating lever for said switch extending through said opening, one pole of said switch being a spring member having a down-turned portion, the second pole of said switch comprising a plate formed with an out-turned lug located adjacent the said spring member, said lever having a presser member to engage said do'wnturned portion whereby said levcr, upon act-nation, presses said spring member against said lug.

2. An electrical connector plug having switch means therein, there being an opening in one corner of said plug, an actuating lever for said switch extending through said opening, one pole of said switch being a spring member having a down-turned portion, the second pole of said switch comprising an element formed with an out-turned lug, located adjacent the said spring member, said l.(3"0l having a presser member to engage said.

down-turned portion, whereby actuation of said lever presses said spring member against said lug, said element being formed with pivot means for said lever.

3. An electric connccter plug coniprising a sectional casing having current carrying parts therein, a switch included in said parts comprising a resilient blade secured to one of said current carrying parts, said blade being formed with a downwardly turned portion, a lever having a presser end for contacting with said portion, a switch element formed with journal means for said lever, said element having a lug located adjacent the resilient blade, wherebysaid lever, when moved in one direction into contact with said downtnrned portion, moves the blade into conta it with said lug.

4. An electric connector plug comprising a sectional casing having current carrying parts therein, a switch included in said parts comprising a resilient blade secured to one of said current carrying parts, said blade having a downwardly turned portion, a lever having a presser end for contacting with said portion, a switch element formed with journal element means for said lever, said element 5 having a lug located adjacent the resilient blade, whereby said lever, when moved in one direction into contact with. said doWnt-urned portion, moves the blade into contact with said lug, said prcsser end having means to allow quick release thereof upon movement 10 of the lever in the opposite direction.

In testimony whereof I affix my signature.

LOUIS PROPP. 

